A puppy is born with a malformed right leg. A veterinarian studies the animal and determines that all of the correct types of cells are present, but that the leg simply took on the wrong shape. This is most likely a problem of
A) morphogenesis.
B) cell differentiation.
C) histogenesis.
D) preformation.
E) fertilization.
Answer: A) morphogenesis.
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Using the drawing of mRNA below, choose the letter that best fits the description. The special structure formed at this region is required for initiation of translation. ____
What will be an ideal response?
Which of the following is NOT true
concerning conifers? a. They form seeds in female cones. b. They have needlelike and scale-like leaves. c. They have a thick cuticle. d. They have motile sperm. e. They are mostly evergreen
Iteroparity is common in which of the following organisms?
a. perennial herbaceous plants b. most insects c. agaves d. most invertebrates e. Pacific salmon
Chihuahuas, Border Collies, and Great Danes (all domestic dogs) descend from the same wolf species and can still interbreed. These varieties were produced by
A) speciation. B) artificial selection. C) natural selection. D) genetic drift. E) inheritance of acquired traits.